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An 80-hour full and partial closure of the 405 Freeway through the Sepulveda Pass continued as scheduled on Saturday, as workers prepared to temporarily close all northbound lanes on the interstate, authorities said.

An 80-hour full and partial closure of lanes on the 405 Freeway through the Sepulveda Pass continued Saturday, Feb. 15, 2014 (Credit: KTLA)

Officials urged motorists to avoid the freeway during the long Presidents Day weekend.

“We do encourage everyone to stay away from the area. Enjoy your time at home and let’s get through the ‘Jamzilla’ together,” said Battalion Chief Don Reyes of the Los Angeles Fire Department.

Earlier, officials had expressed concern about congestion on the suggested detours and alternate routes.

“You see a lot of red on the maps, on” Pacific Coast Highway, the 101 Freeway and the 110 Freway, said Caltrans spokesman Patrick Chandler. “So we know people are going around the area, but maybe they’re not cutting back on their trips like they did for Carmageddon I and II,” he said, referring to previous closures on the 405 Freeway.

Dubbed “Jamzilla,” the current closures were slated to affect a six-mile stretch of northbound lanes from Getty Center Drive to Ventura Boulevard.

During daytime hours, two northbound lanes will be open, but all five will be closed at night.

Southbound lanes were expected to remain open during the day, though transportation officials advised that there may be some lane closures on that side of the freeway at night.

The connector ramps from the 10 Freeway to the northbound 405 Freeway would also be closed, according to Metro.

The shutdowns through the Sepulveda Pass will allow workers to pave and re-stripe the highway where a carpool lane is being added.

According to Metro, a full closure of northbound lanes was slated to be in effect during the following times: